[PATCH 2/2] user32/combo: Don't redraw the Combo Box when dropped down if it has an editbox

[Gabriel Ivăncescu]

Some applications subclass the combo box and handle WM_ERASEBKGND themselves,
without using WS_CLIPCHILDREN. This causes them to erase over the editbox
child. There's no reason to redraw it in this case since the editbox is
supposed to cover it, anyway.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=22260
Signed-off-by: Gabriel Ivăncescu 
---
 dlls/user32/combo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/user32/combo.c b/dlls/user32/combo.c
index 59c2e64..bd9a852 100644
--- a/dlls/user32/combo.c
+++ b/dlls/user32/combo.c
@@ -1051,7 +1051,7 @@ static void CBDropDown( LPHEADCOMBO lphc )
                  SWP_NOACTIVATE | SWP_SHOWWINDOW );

-   if( !(lphc->wState & CBF_NOREDRAW) )
+   if( !(lphc->wState & (CBF_NOREDRAW | CBF_EDIT)) )
      RedrawWindow( lphc->self, NULL, 0, RDW_INVALIDATE |
    		   RDW_ERASE | RDW_UPDATENOW | RDW_NOCHILDREN );